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Bio 120 Lab > mid practical > Flashcards

mid practical Flashcards

1
Q

The number of hydrogen atoms attached to each carbon in a a triglyceride determines its degree of:

A

saturation

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2
Q

Students in this lab (as well as other lab technicians and investigstors!) can test for the presence of sugars using a test that incorporates a chemical called _____________ __________, which reacts with monosaccarides and disaccharides (except sucrose!) in the presence of heat to change from its original blue and produce a green, yellow, or orange color.

A

Benedict’s reagent

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3
Q

Proteins in a sample can be test for using a chemical called ________ ___________ , which turns pinkish purple in the presence of proteins.

A

Correct Biuret reagent

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4
Q

Nonpolar molecules such as triglycerides are attracted to similar nonpolar molecules, and repelled by water. This means they are ___________, and not water soluble.

A

hydrophohbic

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5
Q

The presence of starch in a sample can be detected using a reagent called _________ __________, a special preparation of iodine

A

lugol’s solution

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6
Q

Carbohydrates consisting of two linked sugars are called __________.

A

disaccharides

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7
Q

Plants which germinate, grow for a season, overwinter… then flower, produce seeds, and die in the second year, such as Garlic Mustard (Alliaria petiolata) are called _______________.

A

biennial

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8
Q

Change over time in the composition of organisms in a community or area, paticularly after a disturbance, is called:

A

succession

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9
Q

What was your favorite plant, organism, or topic on the nature hike?

A

Butterfly Bushes

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10
Q

In the melting point experiment, we were given lard, olive oil, safflower oil, and butter. Safflower oil usually melts first, followed by olive oil, then butter, and finally, or sometimes not at all, the lard. Which is likely to have the highest degree of UNsaturated fats?

A

Safflower

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11
Q

What is the point of an emulsifying agent?

A

Binding hydrophobic and hydrophilic compounds together

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12
Q

What color indicates a positive result of starch testing with Lugol’s iodine?

A

black

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13
Q

As you increase magnification of a microscope by using higher power objectives, your depth of field _______________

A

decreases

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14
Q

What power objectives are available on these microscopes?

A

4x, 10x, 40x & 100x

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15
Q

What len(es) is/are OK to use the coarse adjustment knob with?

A

the scanning/4x objective only

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16
Q

what is the only material to touch the microscope lenses? _________ _________________

A

lens paper

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17
Q

What is the rated power/magnification of the ocular eyepiece lenses? (Spoiler - it’s in the diagram)

A

10x

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18
Q

What is the TOTAL MAXIMUM MAGNIFICATION of these compound microscopes?

A

1000x

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19
Q

Aside from the on/off switch and the rheostat, the next most important part of the compund microscope involved in light control (and image clarity) is the _________ _________________
(Hint: it’s under the stage…and double check the spelling)

A

iris diaphragm

20
Q

The 10x “eyepiece” that you look through is called the __________ _____________

A

Ocular lens(es)

21
Q

Another word for a lining or the surface-boundry tissue type is ______________ tissue.

A

epithelial

22
Q

The group of organisms that lack a nucleus, such as bacterial or archaea cells, are referred to as:

A

prokaryotic cells

23
Q

Cells, such as “animal” or “plant” cells which contain a nucleus are known as:

A

eukaryotic cells

24
Q

In prokaryotes, the DNA is found free in the __________________ of the cell.
(Use the technical term; watch spelling)

A

cytoplasm

25
Q

The technical/medical/scientific term for red blood cells is__________________

A

erythrocytes

26
Q

What biological activity do choloplasts (and cyanobacteria) participate in?
(Starts with a “p”…mentioned about 1” above them…)

A

photosynthesis

27
Q

The large fluid-filled sack/compartment in plant cells that serves to store water is the _____________

A

vacuole

28
Q

Since we’re using the ‘scopes again…what objective len(es) is/are it aceptable to use the coarse focus knob of the compound microscope with?

A

Just the 4x

29
Q

The membrane-bound, DNA containing organelle “easily” visiible in properly stained eukaryotes is the ____________.

A

nucleus

30
Q

Animal” cells like our cheek cells were irregular in shape because they do not have a rigid, cellulose containing ________ ________ like plant cells.

A

cell wall

31
Q

he technical term for a white blood cell is a __________________.

A

leukocytes

32
Q

_____________, or lining tissue, lines inernal and external free surfaces of the body.

A

epithelial

33
Q

A biological molecule that catalyzes reactions (speeds them up wihtout itself being consumed) is an ____________.

A

enzymes

34
Q

THe process of a protein unfolding, changing shape, and losing its proper three dimentional structure is ________________________

A

denaturation

35
Q

Neutral pH on the pH scale has a (numeric) value of __.

A

7

36
Q

The ____________ is the molecule on which enzymes act.

A

substrate

37
Q

In this experiment, we investigate changing enzyme concentrations, pH, and changing the _______.

A

temperature

38
Q

The carbon fixed as glucose in photo synthesis comes from what carbon containing molecule?

A

Carbon Dioxide

39
Q

______________ is the process where glucose is broken down into 3-carbon units

A

glycolysis

40
Q

Reactions in the mitochondria futher react the pyruvate producing carbon dioxide, as part of the _____ ______ reactions.

A

Krebs Cycle

41
Q

in the presence of oxygen, the electron transport chain produces a lot of ____ (use abbreviation), an energy storage or “quick energy” molecule.

A

ATP

42
Q

In the absence of oxygen (or a functional electron transport chain), pyruvates broken down in a process called ______________, prodcing alcohol, carbon dioxide, or lactic acid.

A

Fermentation

43
Q

We use a pink indicator dye, phenolpthalein, in this lab, which is pink when the solution is ________

A

alkaline (basic)

44
Q

While varying the distance of the lamp in the photosynthesis experiment, the challenge becomes keeping the ___________ of the water bath constant.

A

temperature

45
Q

The photosyntheis relies on using __________ ___________ solution, to provide additional carbon dioxide to the water.

A

potassium bicarbonate

46
Q

the mitchondrial reactions in the Krebs cycle produce __x as much ATP per glucose molecule as gycolysis.

A

18

Bio 120 Lab (1 decks)

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